US5228744A - Apparatus for locking operative position of each furniture on furniture raising/lowering type floor equipment - Google Patents

Apparatus for locking operative position of each furniture on furniture raising/lowering type floor equipment Download PDF

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Publication number
US5228744A
US5228744A US07/813,974 US81397491A US5228744A US 5228744 A US5228744 A US 5228744A US 81397491 A US81397491 A US 81397491A US 5228744 A US5228744 A US 5228744A
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US
United States
Prior art keywords
furniture
raising
lowering unit
link plate
engagement
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US07/813,974
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English (en)
Inventor
Noboru Sugiyama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kotobuki and Co Ltd
Original Assignee
Kotobuki and Co Ltd
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Filing date
Publication date
Application filed by Kotobuki and Co Ltd filed Critical Kotobuki and Co Ltd
Assigned to KABUSHIKI KAISHA KOTOBUKI reassignment KABUSHIKI KAISHA KOTOBUKI ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: SUGIYAMA, NOBORU
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Publication of US5228744A publication Critical patent/US5228744A/en
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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/12—Theatre, auditorium or similar chairs
    • A47C1/126—Theatre, auditorium or similar chairs stowable in floor or wall

Definitions

  • the present invention relates to an apparatus for locking an operative position of each furniture to be accommodated in a furniture accommodating chamber of a furniture raising/lowering type floor equipment. More particularly, the present invention relates to an apparatus for locking an operative position of each chair in an tilted state on the furniture raising/lowering type floor equipment.
  • this kind of floor equipments are roughly classified into two types, i.e., an expansible/contractive platform displacement type floor equipment and a furniture raising/lowering type floor equipment.
  • the present invention is concerned with the latter type of floor equipment, i.e., the furniture raising/lowering type floor equipment.
  • An object of the present invention is to provide an apparatus for locking an operative position of each furniture such as a chair or the like to be accommodated in a furniture accommodating chamber of a furniture raising/lowering type floor equipment wherein the apparatus is simple in structure and handling of the apparatus is easy for any user such as an audience or the like.
  • Another object of the present invention is to provide an apparatus for locking an operative position of each furniture such as a chair or the like to be accommodated in a furniture accommodating chamber of a furniture raising/lowering type floor equipment wherein the furniture can manually be locked at a predetermined position on the floor equipment without any necessity for arranging an actuator or similar means.
  • an apparatus for locking an operative position of each furniture to be accommodated in a furniture accommodating chamber of a furniture raising/lowering type floor equipment wherein the furniture is mounted on a raising/lowering unit vertically displaceably arranged in the furniture accommodating chamber and the operative position of the furniture is reached when the raising/lowering unit is fully raised up and the furniture is then tilted wherein the apparatus comprises a triangular link plate turnably supported on a rotational shaft transversely projecting from the raising/lowering unit, the link plate including a stopper at a first corner and joint pins at second and third corners thereof; a support shaft for the furniture turnably arranged on the rotational shaft of the raising/lowering unit and made integral with the link plate; an opposing pair of substantially inverted U-shaped turnable engagement pieces each including an inside projection and an outside projection adapted to come in contact with the upper surface of a frame arranged at the upper end of the furniture accommodating chamber by turning movement of the engagement pieces about a pin on the inside projection thereof; and the raising/lowering unit including engagement
  • FIG. 1 is a vertical sectional side view of a furniture raising/lowering type floor equipment, particularly illustrating that a chair is accommodated in a furniture accommodating chamber of the furniture raising/lowering type floor equipment together with a raising/lowering unit;
  • FIG. 2 is a vertical sectional view of the furniture raising/lowering type floor equipment, particularly illustrating that the chair is raised up in an inclined state on the floor surface of a building;
  • FIG. 3 is an enlarged fragmentary side view of an apparatus for locking an operative position of each furniture such as a chair or the like to be accommodated in a furniture accommodating chamber of a furniture raising/ lowering type floor equipment in accordance with an embodiment of the present invention, particularly illustrating that a support rod for the furniture is held in an unlocked state; and
  • FIG. 4 is an enlarged fragmentary side view of the apparatus shown in FIG. 3, particularly illustrating that the support rod for the furniture is held in a locked state when the furniture is fully raised up on the floor surface of a building.
  • FIG. 1 illustrates the embodiment of the present invention wherein an apparatus of locking an operative position of each furniture to be accommodated in a furniture accommodating chamber of a furniture raising/lowering type floor equipment is employed for an array of chairs.
  • reference numeral 1 designates a furniture raising/lowering type floor equipment (hereinafter referred simply as a floor equipment) for a building such as a hall, a theater, a gymnasium or the like.
  • a chair 5 is accommodated in a furniture accommodating chamber 3.
  • the furniture accommodating chamber 3 is formed in the hollow space defined by frames 2 of the floor equipment 1.
  • Reference numeral 4 designates a raising/lowering unit which is vertically displaceably accommodated in the furniture accommodating chamber 3.
  • a driving mechanism (not shown) is actuated, the raising/lowering unit 4 having a chair 5 mounted thereon is displaced in the furniture accommodating chamber 3 in the upward/downward direction so that the chair 5 is raised upward of the floor surface of a building or lowered downward of the same.
  • the raising/lowering unit 4 includes a pair of engagement portions 6 on the opposite sides at the lower end thereof so that the engagement portions 6 come in engagement with the lower surfaces of frames 2.
  • Reference numeral 7 designates a rotational shaft.
  • the rotational shaft 7 is rotationally supported on the raising/lowering unit 4 projecting from the same so as to simultaneously turn a triangular link plate 8 and a support rod 9 of which upper end is fixedly secured to the chair 5.
  • Reference numeral 10 designates an opposing pair of substantially inverted U-shaped engagement pieces.
  • Each engagement piece 10 includes an inside projection 11 of which lower end is turnably supported on the raising/lowering unit 4 to turn about a shaft 12.
  • the engagement piece 10 includes an outside projection 13 adapted to come in engagement with the frame 2.
  • Reference numeral 14 designates a link of which one end is pivotally connected to the engagement piece 10 via a pin 14a and of which other end is pivotally connected to the link plate 8 via a pin 14b.
  • Reference numeral 15 designates a stopper which transversely projects from the link plate 8. As the link plate 8 turns about the rotational shaft 7 in the clockwise direction, the stopper 15 is brought in engagement with a stopper pin 16 which is located on the locus of turning movement of the stopper 15 at the lower end of the raising/lowering unit 4.
  • the apparatus of the present invention is constructed in the above-described manner, to raise up the chair 5 on the floor surface of the building to assume an operative attitude away from an accommodated attitude in which the chair 5 has been downwardly folded and accommodated in the furniture accommodating chamber 3 as shown in FIG. 1, first, the raising/lowering unit 4 is raised up by actuating the driving mechanism (not shown). This causes the engagement portions 6 projecting from the raising/lowering unit 4 to come in contact with the lower surfaces of the frames 2, resulting in raising-up movement of the raising/lowering unit 4 to be interrupted. At this time, the raising/lowering unit 4 has assumed an intermediate operative state as shown in FIG.
  • the support rod 9 is turned about the rotational shaft 7 in the clockwise direction as seen in the drawing with an user's hand (not shown), whereby the chair 5 mounted on the raising/lowering unit 4 via the support rod 9 assumes an inclined state, i.e., an operative state as shown in FIG. 2.
  • the link plate 8 is turned together with the rotational shaft 7, the engagement pieces 10 are turned about the shafts 12 in the outward direction via the links 14 so that the outside projections 13 of the engagement pieces 10 are displaced toward the upper surfaces of the frames 2 to come in contact with the same. This causes each frame 2 to be clamped between the engagement portion 6 of the raising/lowering unit 4 and the outside projection 13 of the engagement piece 10.
  • the support rod 9 is turned from the positional state as shown in FIG. 4 in the anticlockwise direction with the aid of operator's hands, causing the link plate 8 to be turned about the rotational shaft 7 in the anticlockwise direction, whereby the stopper 15 is disengaged from the stopper pin 16.
  • each engagement piece 10 is turned about the shaft 12 in the inward direction so that the engagement pieces 10 are released from engagement with the frames 2. Consequently, since the raising/lowering unit 4 is entirely disengaged from the frames 2, the raising/lowering unit 4 can be lowered by actuating the driving mechanism (not shown) and the chair 5 can be accommodated in the furniture accommodating chamber 3. 5
  • the apparatus of the present invention should not limitatively be employed only for the aforementioned furniture accommodating structure but it may be employed as a position locking apparatus for a tilting mechanism for tilting an array of chairs.
  • the apparatus is constructed such that the stopper of the link plate is brought in engagement with the stopper pin of the raising/lowering unit merely by turning the support rod for a furniture, and at the same time, the frames, i.e., stationary members can be locked with the outside projections of the engagement pieces in cooperation of the engagement portions of the raising/lowering unit, a locking operation can be performed very simply and easily.
  • the link plate since the link plate is immovably held on the raising/lowering unit in cooperation of the stopper with the stopper pin after completion of the locking operation, the link plate can reliably be held in a locked state without any possibility that the locked state of the apparatus is unexpectedly or unintensionally released no matter how a load such as an exterior force or the like is exerted on the link plate.
  • an advantageous effect of the present invention is that the apparatus can be constructed in simple structure with excellent rigidity.

Landscapes

  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
US07/813,974 1990-12-27 1991-12-26 Apparatus for locking operative position of each furniture on furniture raising/lowering type floor equipment Expired - Fee Related US5228744A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1990406908U JP2547026Y2 (ja) 1990-12-27 1990-12-27 稼働家具類の位置決めロック装置
JP2-406908 1990-12-27

Publications (1)

Publication Number Publication Date
US5228744A true US5228744A (en) 1993-07-20

Family

ID=18516525

Family Applications (1)

Application Number Title Priority Date Filing Date
US07/813,974 Expired - Fee Related US5228744A (en) 1990-12-27 1991-12-26 Apparatus for locking operative position of each furniture on furniture raising/lowering type floor equipment

Country Status (3)

Country Link
US (1) US5228744A (enrdf_load_stackoverflow)
EP (1) EP0492646A1 (enrdf_load_stackoverflow)
JP (1) JP2547026Y2 (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5795017A (en) * 1996-11-18 1998-08-18 Zimmerman; Matthew K. Stowable fish fighting chair
US11479981B2 (en) * 2019-05-29 2022-10-25 Hall Labs Llc Systems for releasably securing a platform

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US853893A (en) * 1905-11-24 1907-05-14 Charles L Miller Chair.
US1062010A (en) * 1912-07-31 1913-05-20 Andrew E Jacobson Chair.
US3025106A (en) * 1959-08-17 1962-03-13 American Seating Co Foldable seating structure
US4562046A (en) * 1983-12-02 1985-12-31 Phillips Petroleum Company Catalytic cracking unit

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2614348B1 (fr) * 1987-04-21 1989-12-22 Compagnone Rocco Dispositif pour l'effacement d'un objet mis en position d'attente sous un plan ainsi degage

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US853893A (en) * 1905-11-24 1907-05-14 Charles L Miller Chair.
US1062010A (en) * 1912-07-31 1913-05-20 Andrew E Jacobson Chair.
US3025106A (en) * 1959-08-17 1962-03-13 American Seating Co Foldable seating structure
US4562046A (en) * 1983-12-02 1985-12-31 Phillips Petroleum Company Catalytic cracking unit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5795017A (en) * 1996-11-18 1998-08-18 Zimmerman; Matthew K. Stowable fish fighting chair
US11479981B2 (en) * 2019-05-29 2022-10-25 Hall Labs Llc Systems for releasably securing a platform

Also Published As

Publication number Publication date
JP2547026Y2 (ja) 1997-09-03
EP0492646A1 (en) 1992-07-01
JPH0493635U (enrdf_load_stackoverflow) 1992-08-14

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Owner name: KABUSHIKI KAISHA KOTOBUKI

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:SUGIYAMA, NOBORU;REEL/FRAME:005966/0968

Effective date: 19911213

Owner name: KABUSHIKI KAISHA KOTOBUKI, JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SUGIYAMA, NOBORU;REEL/FRAME:005966/0968

Effective date: 19911213

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Effective date: 20050720